A sterile implantable artificial substitute for a diseased or injured humeral head. It is made of metal [e.g., titanium (Ti), cobalt-chrome (Co-Cr), stainless steel] and designed to be attached to a humeral stem prosthesis and to articulate with the natural glenoid fossa, a glenoid fossa prosthesis, or a humeral head bipolar component as part of a shoulder replacement.